Apparatus for destroying waste



June 17, 1930. A. H. MANN APPARATUS FOR DESTROYING WASTE I Filed Sept. 27,. 1926 4 Sheets-Sheet f arzau%%m.

June 17, 1930. A. H. MANN 1,764,637

' APPARATUS FOR DESTROYING WASTE 7 Filed Sept. 27,- 19 267 4 Shets-Sheejr. 2

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APPARATUS FOR DESTROYING WASTE Filed Sept. '27, 1926 4 Sheets-Sheet 4' j l //6 -fl heat insulating and Patented June 17, 1930 ARTHUR H. MANN, or NYAoK, NEW YORK; Assienon, BY viryinsiinAssIeivMnmrs, To

" MMORSE BoU enn nnsrnuoron 00., A oonronArioiv or DELAWARE APPARATUS non nnsrnoYiivG'wAsTnz Application filed September 27, 1926." Serial No. 137,854

This invention relates to v apparatus for destruction ofwasteand infectious material,

and, among other objects aimsto provide an improved apparatus ofv this character which will quickly destroy the waste and infectious material without scattering or dis-:

' 1o set forth and described in the following specificationand shown in the accompany-l 'ing drawings in which ,1 7

Fig. 1 is-a vertical section through one embodiment of my improved apparatus.

Fig.2 is a vertical section .alongthe line 272 O F g- V 1 'Fig. 31s a vertical section along theline '33 of 'Figfl showing a modification.

Fig. 4 isa vertical section along the irreg- 20. ular line H of Fig. 3. v a,

vLike numerals refer to (like elements throughout the drawings in which l0 indicates generally a furnace constructed ,of refractory tile or brick and encased in suitable protecting materials as illustrated in=Fig-.'1.-

and adjacent to the fuel opening 10 as shovvn'inFigfl. A suitable charging openranged in {a side Wall to permit charging of rubbish or waste upon the grate 13'; alsoto permit removal of cl-inker or accumulated incoinbustible material-from the grate. V Located rearwar dly of the grate 13 and slightly thereabove is the arched hearth 15 extending rearwardly from the partition Wall 12 and near the side wallsofthefurnace 10;. charging opening 10? is proofthe furnace.-

level of the hearth 15f The front Wall 10 of the furnace is aper-. tured to provide a burner opening 10 inalignment with the fuel supply nozzle genso erally-indicated by numeral 11. 'Projecting upwardly from the base or floor 10 of the furnace is a supporting and separating par-- ing is indicated in dotted lines and desig nated by numeral 10, the same beingars.

opening is located above the arch 15to permit charge of wet Waste,garbage or the like upon the hearth 15. The hearth terminates videdi'inf the top ,of the; furnace, the being normally' closed by a cover 16' This some distanceshortof the rear end wall 10% 1 Located belovvthe I a V is a second arched hearth l7 which extends forwardly from the rear ndjWalllO toa point beneath the rear end of'the -hearth-l5,,a

passage 10 being provided therebetween'.

leading to the combustion or settling chamber 102 which underliesthe hearth 1-5,.,as

shown in Fig. 1. The arched hearth 17 is preferably inclined; upwardly from the end wall 1O to resist removal or. carrying away of the infectious materialdeposited thereon under the influenceof the draft during combustion.

Indicated in, dotted lines, is" a.

charging opening 10 insubstantial val-ig'rnmentwith the hearth 1 7 to permit charging and cleaning of the same when desired.

In the end wall 107 "is provided the outlet passage 10 leadingLtO the stack-18; A chamber or passage 10 is providedbeneath the hearth17and afiords not only anieansl of communication betweentheichamber 10. I

in the'sidefwall, as indicated-in ydottedlines in Fig? 1,1these portsbeingequipped with closures or 'doors20,;-as shown in Fig. 2, for 7 example; The chargingopenings 10 and 10 are also provided Withsuitable closures as indicated in dotted lines by numeral 21. (See Fig,2.)rb

In the use of the, apparatus described and the practice of; my process; the waste, as from a tuberculosisinstitution,- for example,

is preferably segregated .or classified roughly into three classes; Efirst, what is termed dry busti ble andca'pable of; quick ignitionfand read lf supporting combustion. The second class} is termed wet Waste-and consists of rubbish, thisgfbeing' generally highlyicom and enhance combustion thereof. The third class is a class of highlyinfectious material, which may be more or less mo1st,such as sputum cups and the llke, which are highly dangerous to handle, and which preferably are subjected to high. intense heat, which almost immediately sterilizes the waste and I brin 's it to combustion and destruction in b a 0 J c L a relatively short time without permitting I the carrying of infection or germs by the draft or solids carried by the gases to points outside the furnace where infection might result. V

The first class ofwaste is charged'upon the grate13, the second is charged through the oper'iinglO upon the hearth 15, and the third is deposited" or charged upon the hearth 17 The rubbish or relatively dry waste quickly ignites from the burner flames injected through the opening 10 and the heat generated by the combustion of this rubbish is added to the heat of the gases of combustion from the'burner and the accumulated heatis passed over and contacts the wet 'wa'ste upon the hearth 15. This is brought to a combustible condition by this heat action and the heat of its gases generated together with such combustion as takesplacefis also added to the heat to which it is subjected, and theresultant cumulative heating draft or 'currentis directed upon the' infectious waste .upon the hearth 17, which it is forced to contact by the reversal in flow, which occurs as it is directed toward the passagelO 'This reversal in flow also has'a tendency to slow down the velocity of the draftand the relatively large space above thehearth 17, coupled with this check- .ing of-the velocity, permits an intimate commingling of the previously generated gases, and further propagation of the combustion.

'This results in the production of an intense heat which is directed as described upon the infectious waste, which is thereby quickly rendered sterile and broughtto a combustible condition and then burned, the gases re r sulting from its heating being carried with the previously generated gases into the settling and combustion chamber 10, which may be termed thefinal combustion cham her, where such combustion may be com-' pleted' andmade substantially thorough. At

the same time added space is provided for the expansionofthe gases which checks their velocity and permits settling offsuspended'solids or the like in'the bottom of the chamber 10 where, if it is combustible it mayburn, if not,'where it may be readily removed. This final combustionchamber 10 being located beneath the hearth 15 heats the same from beneath and enhances and accelerates the combustion and distillation of the The inclination of the hearth 17 upwardly from the end wall 1O resists carrying or displacementof; the infectious waste from the hearth prior to its sterilization and substantial destruction.

The clean-out ports 10 may be availed of to remove deposited matter from the bottom of thechambers 10 and 10, and the ash may be removed through a similar clean-out port in the ash pit 10 while such clinker or accumulation of non-combustibles as accumulate upon the grate 13 andhearth 17 may be removed from time to time through the ports-10 and 101 as will be obvious.

InfFigs. 3 and 4 I have illustrated another embodiment of my invention'which also may be" used to practice the same process. In these figures I have designated the furnace generally by numeral 100. 'The' construction is generally similar to that illustrated in Figs. -1 and 2, and I have applied the same numerals to the same structural features in such as coal, coke or the like are charged with the dry rubbish upon the grate 13. I have illustrated a charging duct 100 as extending to an upper level A, such as an upper floor, with asuitable cover 116 for the duct at such floor level. L Also, I provide a secondary source of heat comprising a grate 25 having a charging opening 25 associated therewith as indicated in dotted lines in Fig. 3. A supporting abutment 26 extends upwardly from the base of the furnace and is spaced from the partition or abutment 12 a sufiicient distance to support the grate 25 and to provide an ash pit'25 therebe neath. r

. It may be desirable in some instances to utilize this secondary source of heat in which event fuel is chargedthereon and combustion maintained. The heat from such combustion serves to increase the heating of the hearth 15 beinglocated therebelow, and the gases from this secondary combustion are added to those previously generated and in their passage through the final combustion chamber 10 they pass along the hearth lo'first," and then beneath the'hearth 17 adding to the heating of such hearths, as-will be obvious. From the outletpassage 10 leads a laterally directed outlet 11 8, the flow through which is regulated by a sliding'damper 30 which may well known manner. I

It will be apparent that my' invention is be used to controlthe draft in the furnacein susceptible of modificationand variation, and

I do not wish to be restricted to the forms described and shown, save as defined inthe appended claims.

WhatI claim is: v 1. A furnace of the character described comprising in combination a grate for the reception of relatively dry combustible waste,

an elevated imperforate hearth extending fromsaid grate and having associated therewith means to permit the deposit of moist material may be deposited thereonand posiand relatively combustible refuse thereon, said hearth being terminated short of the furnace wall-in'the direction of travel of gases of combustion'to provide a downwardly extending passage therefor, and a second imperforate hearth, located below said passage and having means by which infectious 'tioned relatively to thefirst hearth to prothereby.

vide a passage for gases of combustion above saidsecond hearth, said furnacebeing constructed and arranged to provide a spacebe- V yond said passage over the second hearth enlarged in cross section relative to said passage to check the velocityof the gases and permit the settling out of particles carried 2.- A furnace of the character described comprising in combination a grate for the reception of relatively dry combustiblewaste,

an elevated imperforate hearth extending from said grate and having associated there- I with'means to permit the deposit of moist M and relatively combustible refuse thereon,

said hearth being terminated short of the furnace wall in the direction of travel of furnace wall in the' direction of travel of gases of combustion to provide a downwardly extending passage therefor, and a second imperforate hearth located against said furnacewallbelow said passage to provide a space below the first hearth for the travel of gases of combustion,"said second hearthbeing inclined against the flow of gases to prevent the liquid refuse from running off said hearth under the influence of gravity and having a wall atitslower end to prevent escape of 'suchliquid at that end, and means by which infectious materialmay be de'pos ited on said second hearth, said furnacebee' ing constructed andarranged to provide a space beyond said passageover'the second hearth enlarged in cross section relative to said passage to check the velocity'of the gases and permit the settling outlof particles carried thereby;-

In testimony whereof, have signed m nameto this specification.

ARTHUR M NN,

gases of combustion to provide a downwardlyextending passage therefor, and a second imperforate hearth located against said furnace wallbelow said-passage to provide a space below the first hearth for'the travel of gases ofcombustion, said second hearth being-inclined against the flow of gases to re sist the tendency of saidflow to carry particles from said second hearth, and means by com risin in combination a ratefor the reception of relatively dry combustible waste, an elevated imperforate hearth. extending fromsaid grate and having associated there,-

with means to permit the deposit of moist and relatively combustible refuse thereon,

.said'hearth" being terminated short of the 

